Celestion Ditton 66’s. ‘Upgrade’ to modern speakers consequences?


I have some vintage Celestion Ditton 66’s that have had their crossovers professionally recapped and serviced. All speaker units are in excellent condition.

My question is.. what might I gain and what might I lose (sonically not financially..) by replacing them with high quality large/floor standing speakers manufactured in the last decade or so?

My amplification set up is a Yamaha C4 preamp and a Yamaha 2200 power amplifier both recently recapped and serviced.

Source is mostly streaming Tidal or CD player via a Chord Hugo DAC, and occasionally some vinyl.

yamayama

You’ll need to spend in excess of $10K to equal the Ditton 66 in terms of full range power response. Focal Kanta 3 would be one to check out. Expect greater resolution and more articulate bass with lower coloration overall. If this is way out of the budget, sit tight and enjoy. Maybe try new speaker cables. 

Thanks everyone for the contributions, very helpful and duly noted.

@twoleftears mine seem v similar to yours sans the wood renovation. Three loudspeakers and one passive radiator. With the MD (or is it the MF) 500 pressure horn midrange. (Which I think must be key to the 66’s distinctive sound..)

Are yours MKI or MK II?